6781752980669 has 2 divisors, whose sum is σ = 6781752980670. Its totient is φ = 6781752980668.

The previous prime is 6781752980627. The next prime is 6781752980701. The reversal of 6781752980669 is 9660892571876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6013039622500 + 768713358169 = 2452150^2 + 876763^2 .

It is a cyclic number.

It is not a de Polignac number, because 6781752980669 - 2²⁴ = 6781736203453 is a prime.

It is a super-2 number, since 2×6781752980669² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6781752980596 and 6781752980605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6781752980609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390876490334 + 3390876490335.

It is an arithmetic number, because the mean of its divisors is an integer number (3390876490335).

Almost surely, 2^{6781752980669} is an apocalyptic number.

It is an amenable number.

6781752980669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6781752980669 is an equidigital number, since it uses as much as digits as its factorization.

6781752980669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 548674560, while the sum is 74.

The spelling of 6781752980669 in words is "six trillion, seven hundred eighty-one billion, seven hundred fifty-two million, nine hundred eighty thousand, six hundred sixty-nine".